From 84569b6c22cb4eda9c682aabeb5f658112126780 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 3 Nov 2024 11:07:27 +0100
Subject: [PATCH] avformat/icodec: fix integer overflow with nb_pal

Fixes: runtime error: signed integer overflow
Fixes: 42536949/clusterfuzz-testcase-minimized-fuzzer_loadfile-6199846684393472
Found-by: ossfuzz
Reported-by: Kacper Michajlow
Tested-by: Kacper Michajlow
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/icodec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/icodec.c b/libavformat/icodec.c
index afd0c71b1f..b09d0060a6 100644
--- a/libavformat/icodec.c
+++ b/libavformat/icodec.c
@@ -198,7 +198,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
             AV_WL32(buf + 32, image->nb_pal);
         }
 
-        if (image->nb_pal > INT_MAX / 4 - 14 - 40)
+        if (image->nb_pal > INT_MAX / 4 - 14 - 40U)
             return AVERROR_INVALIDDATA;
 
         AV_WL32(buf - 4, 14 + 40 + image->nb_pal * 4);